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Class 10
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Ohm's Law
Ohm's Law
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1)
Which Law explains the following. At constant temperature the current flowing through a conductor is directly proportional to the potential difference between its ends.
Joule’s Law
Boyle’s Law
Charle’s Law
Ohm’s Law
2)
The current through a wire depends on?
Both resistance and potential difference.
The potential difference applied.
The thickness of the wire.
The resistance of the wire.
3)
Which of the following is an example for Ohmic resistor?
Nichrome
Diamond
Germanium
Diode
4)
What is reciprocal of resistivity called?
Specific resistance
Conductivity
Conductance
Capacitance
5)
Which of the following statement does not represent Ohm's Law?
potential difference/resistance = current
potential difference / current = resistance
current = resistance x potential difference
potential difference = current x resistance
6)
The work done in moving a unit positive charge across two points in an electric circuit is a measure of ___________.
potential difference
current
resistance
power
7)
The potential at a point is 20 V. The work done to bring a charge of 0.5 C from infinity to this point will be ________.
5 J
10 J
40 J
20 J
8)
The device used for measuring potential difference is known as _____________.
potentiometer
galvanometer
voltmeter
ammeter
9)
The unit of resistivity is ____________. Answer: 3
ohm
mho
ohm-m
ohm / m
10)
The unit of current is _____________.
volt
coulomb
watt
ampere
11)
Two electric bulbs of 100 W, 200 V are put in series and the combination is supplied 100 V. The power consumption of each bulb will be
100 / 4 W
100 / 16 W
100 / 2 W
100 / 8 W
12)
Ohm's law is not applicable to
small resistors
DC circuits
high currents
semi-conductors
13)
Resistance of a wire is r ohms. The wire is stretched to double its length, then its resistance in ohms is
(A) r / 2
(B) 4 r
(C) 2 r
(D) r / 4.
14)
Resistivity of a wire depends on
length
material
none of the above.
cross section area
15)
Ohm's law is a relationship between
voltage, current, and time
power, current, and resistance
voltage, current, and resistance
resistance, time, and current
16)
If current through a resistance is halved
the resistance is halved
the voltage doubles
none of the above
the voltage is halved
17)
Ohm's law describes the mathematical relationship between
none of the above
ohms, kilohms, and megohms
resistance, voltage, and current
resistor size and resistor value
18)
If voltage across a resistance doubles
none of the above
the current is unchanged
the resistance doubles
the current is halved
19)
If the resistance in a circuit with constant voltage increases, the current will
increase
decrease
Not enough information
stay the same
20)
If doubling the voltage across a resistor doubles the current through the resistor then
the resistor value decreased
the resistor value did not change
the resistor value increased
it is impossible to determine the change in t
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Cite this Simulator:
amrita.olabs.edu.in,. (2014). Ohm's Law. Retrieved 23 May 2017, from amrita.olabs.edu.in/?sub=1&brch=4&sim=99&cnt=388